The main Osc has 5 basic waveforms, Pink and white Noise and a drawable user waveform. The waveforms have different modes like Phase Mod, PWM (Square only) and a special morph mode (listed as PWM in the synth) for all but the square wave. The user waveform can mix or morph between two waveforms.

As you can see from the demo, Krudd sounds pretty decent. It comes with some good presets. However like at least two of their other synths, Kruud sometimes has audible pops and crackle sounds on my platform (16GB RAM, i7 CPU, PC). I am so hoping these issues get resolved soon.